/**
 * Length of Last Word
Given a string s consists of upper/lower-case alphabets and empty space characters ' ', return the length of last word in the string.

If the last word does not exist, return 0.

Note: A word is defined as a character sequence consists of non-space characters only.

For example, 
Given s = "Hello World",
return 5.
 */
package com.xinpan.exercise;

public class LengthofLastWord {
    public int lengthOfLastWord(String s) {
        // Start typing your Java solution below
        // DO NOT write main() function
        int len = 0;
        int e = s.length()-1;
        while(e >= 0 && s.charAt(e) == ' ') e--;
        while(e >= 0 && s.charAt(e--) != ' ') len++;
        
        return len;
    }
}
